What Nigerian food contains acid?

One Nigerian food that contains acid is "Ofe Nsala," a white soup traditionally made with catfish or chicken. It often includes ingredients like utazi leaves, which can add a slight bitterness and acidity. Another example is "Bitterleaf Soup" (Ofe Onugbu), where the bitterleaf plant is used, imparting a mildly acidic taste. Additionally, some Nigerian stews and soups may incorporate tomatoes, which contain citric acid.